/Engine/Plugins/Enterprise/DatasmithImporter/Source/ExternalSource/Public/ExternalSource.h
Override the name of the scene that will be loaded. If the pointer is nullptr, the override will be reset. #ueent_todo This is only required because of the way the Datasmith reimport works. Consider removing it when we adapt the ExternalSource to interchange.
void SetSceneName ( const TCHAR * SceneName )